Hotbed gnd rttn-oxtt table mechanism



W. AHLEN AND K. H. CEDERLUND.

HOTBED AND RUN-OUT TABLE MECHANISM.

APPLICATION FILED MAY 25. 1915.

Patented J My 15, 1919.

4 SHEETSSHEET l.

N. in

W. AHLEN AND K. H. CEDERLU'ND.

HOTBED AND RUN-OUT TABLE MECHANISM.

APPLICATION FILED MAY 25, 1915. Patented July 15, 1919' v 4 SHEETS-SHEET2.

W. AHLEN AND K. H. CEDERLUND.

HOTBED AI\ID RUN-OUT TABLE MECHANISM.

APPLICATION FILED MAY 25. I915.

1,310,231 Patent-ed July 15, 1919.

4 SHEETS SHEET 3.

I I I l l l l l I I I l/VVE/IITORS BY MW w ATTORNEY W. AHLEN AND K. H.CEDERLUND.

HOTBED AND RUN-OUT TABLE MECHANISM.

APPLICATION FILED MAY 25. 1915.

Patented July 15, 1919.

4 SHEETS-SHEET 4.

A ITORIVEY WIELIAM .AHLEN AND KARL H. CEDEBLUND, OF DUQUESNE,PENNSYLVANIA.

I HOTBED AND RUN-OUT TABLE MECHANISM.

Specification of Letters Patent.

Patented July 15, 1919.

Application filed May 215, 1915. Serial No. 30,76.

To all whom it may concern:

.Be it known that we, WILLIAM Amen, a

" subject of the King of Sweden, and KARL -ments in controlling the runouts and-hot bed of a bar rolling mill and similar apparatus.

The accompanying drawings illustrate an embodiment of the invention.

Figure 1 is a diagrammatic plan of the hot bed with adjacent portions ofthe hot run out and the cold run out and showing the locations of theseveral motors and con-' trolling devices;

Fig. 2 is a cross section through the hot bed and the two run outs;

Fig. 3 is a diagrammatic face elevation of' one of the triggers and theelectrical connections controlled thereby; 4

Fig. 4 is a full face elevation of the same;

'Fig. 5 is a plan thereof; 7

Fig. 6 an end face elevation thereof;

Fig. 7 a rear face elevation thereof;

Fig. 8 is a diagram of the circuits of the controlling mechanism.

Referring to the embodiment of the invention illustrated, the hot runout A receives the bar from the mill and carries it along on rollers Buntil its full length, usually of several hundred feet, is alongside thehot bed C- The bar is then kicked off from the-hot run out onto the hotbed where itis shifted laterally step by step by means of the usualracks across the hot bed and onto the cold run out D provided withrollers E.

The coldrun out is so arranged as to collect a number .of bars and thenlower them upon the rollers E, which convey them to the shears. Thebarsmove in the direction of the arrows shown in Fig. 1. They areconveyed one at a time along the hot run out and then shifted therefromin succession onto the hot bed so that there is generally a number ofbars on the hot bed located at successive points in the width and in thecourse of transfer to the cold run out. The racks of the hot bed have acircular motion, the alternate racks being assembled in-two groups, eachof whichmoves upward and Y to the right alternately so as to pick up thebars and convey them step by step across the hot. bed. This is a known.type of hot bed and run cuts. The controlling mechanism of our inventionmay be applied either to this or to other styles of hot bed and runouts.

A trigger or other device for starting the controller is arrangedslightly in advance of the point to which the rear end of the bar musttravel along thehot run out before it can be kicked ofi to the hot bed.A controller is provided which starts its cycle of operations as soon asthe bar passes the trigger, but not before this time. The controllersecures the'proper sequence of operations, as follows. The operation ofthe hot bed rack is begun only after the kick ofi has moved the bar tosuch a position that the hot bed rack may properly receive it. Afterthekick off has moved a bar to the desired position it must be returned andstopped in position to act properly on the next bar from the mill. Thehot bed rack is also stopped in position to receive the next bar fromthe kick off, and is stopped accurately in position so as to prevent thebars from being kinked while cooling. The bars follow each other out ofthe mill very closely. If a bar from the mill reaches the trigger whichcontrols the master switch before the cycle of operations on theprevious bar has been completed, the operations on the previous bar willnevertheless proceed without interference; and as soon as the bed hascompleted its cycle of operations on the first bar it will be ready tohandle the second bar. 4 The apparatus is also arranged to empty the hotbed at any time desired without interfering with the operation of thekick 'ofi. The controller is also equipped with'a safety device toprevent a bar from running off the end of the hot run out if for anycause the usual operation fails.

Referring to Fig. 1, the main trigger F is located along the hot run outslightly in advance of the hot bed. Three such triggers are illustrated.Any one is suflicient, but

three are provided for additional safety in at Y, the hot bed limitswitch at Z and the motor which constitutes the main drive for theapparatus at L. Near the end of the hot run out is located the safetytrigger M. The path of the end of a kick off is shown in dotted lines atH, Fig. 2.

The triggers F and 'connections are-shown in detail in Figs. 3 to 7. Thetrigger is fixed to a rotatable member N carrying a pair of contactrings 0 and P separated from each other and connected respectively toelectrical wires or cables 10 and 20. A spring terminal Q, connected tothe negative wire of the main circuit, hereinafter referred to, bearsagainst the cylindrical surface of the drum N, normally making contactwith the segment P. A rod advancing along the hot run out strikes thetrigger F in the direction of the arrow and swings it to about thedotted line position shown, the rod then passing under the trigger andholding it up in this dotted line position. This movement shifts theconnection of the spring ment 0, or from the wire 20 to the Wire 10,

. and maintains the latter connection until the mately so.

v drum. On the same shaft R at the opposite end of the drum is anarm Sconnected to the upper end of a spring T tending to pull it down and toswing the trigger F down against the adjustable stop U (Fig. 7) whichholds it in a vertical position or approxi- The base V of thetrigger-operated mechanism is mounted, as shown in Fig. 2, above and atone side of the rollers 13 of the hot run out, with the trigger Fprojecting downward between successive rollers B in the path of the barcarried on said rollers.

The controlling switches, resistances and the like of the several'motors are of the ordinary type and are not illustrated in detail as totheir mechanical construction, but are shown diagrammatically in thecomplete circuit in Fig. 8.

The trigger I is normally held by means of the spring T in such aposition as to make contact from the minus wire, through P, to the wire20. When the bar W strikes the trigger it connects the minus wire,through 0 with the wire 10. The trigger is held in this position untilthe rear end of the bar passes the trigger, whereupon the latter isrestored to the normal position shown.

A set up relay X when actuated closes two electrical circuits, 10 tominus and 2 to plus, these circuits being insulated from each other.

A kick off limit switch indicated as a whole at Y is driven from, theline shaft of the kickofi's by chain or gearing with such a ratio thatthe limit switch makes one complete revolution for each operating cycleof the kick off. This kick off limit switch is shown of the face platestyle for the sake of clcarness, the contact disk being supposed torevolve While the finger remains stationary; but it may be of the drumstyle or of any other suitable style.

The kick off motor G is provided with an ordinary automatic acceleratingmagnetic switch controller comprising a series acceIeratingsWitch a, astarting resistance 1) and a braking resistance 0 with switch (Z, thearmature of this kick off motor being shown at 6, series field at f andshunt field at g.

Similarly, the hot bed motor L is provided with a series acceleratingswitch it, a starting resistance 2', a braking resistance j and a switch70 therefor; the armature of this hot bed motor being indicated at Z,the series field at m'and the shunt field at n.

A smallbed-clearing switch 0 of the knife type is used to close thecircuit of the hot bed rack and to continue the hot bed motor inoperation when it is desired to empty the bed without adding furtherbars from the hot run out. I

The safety trigger M is similar in mechanical construction to thetrigger F and is arranged to make two contacts when actuated by a bar,one from 2 to plus, and the other from 20 to minus, the two contactsbeing insulated from each other.

The switches .Y and Z are indicated diagrammatically, the constructionbeing old and well known. A contact finger Y or Z, which is indicateddiagrammatically. ex-

tends upwardly in fixed position from the axis or center of the switch.These contact fingers it and Z will be formed of insulating material inorder to prevent short circuiting through the finger Y and Z. lVhendesired, however, such finger may be made in sections with one sectioninsulated This may represent binding screws or contacts,

these binding screws being fastened to the stationary finger Y or Z. Thefingers Y and Z are adapted to cause the binding screws or contactsthereon to bear on the rings or segments shown, when these rings orsegments are turned to bring them under an opposite contact onthe fingerand to cause each binding screw or contact to become electricallyconnected to the ring or segmentin Whose line or path it lies when therings or segments are in position under or opposite said binding screwsor contacts.

The operation of the various devices in the circuits just described isas follows. When the bar W coming from the mill on the hot run outstrikes the' trigger F a short distance in'advance of the hot bed thistrig-.

ger is moved to the right as described and completes the circuit minusto 10. This closes the circuit of the relay X, through the coil of therelay, the wire 1- and the segment S, which is connectedby the'contactfinger to the plus main as hereinafter described; and its operationlifts the contact disks 1) and g, the disk ;0 also closing the circuitminus to 10 so that the relay holds its own circuit closed. The otherterminal of the relay coil is connected to the plus Wire of the maincircuit through the kick 01f 'limit switch, the connection being fromthe plus segment, which is a complete ring 1' to the small segment 8,the contact finger Y, Fig. 8, being supposed to extend fikedly from thecenter of the disk upward. The circuits remain closed as described aslong as' the trigger is held forward by the bar.

As the rear end of the bar passes the trigger the latter springs back tothe position indicated making an electrical connection from minus to 20.This completes the circuit through the coil which operates the mainswitch t of the kick off motor; the current passing from the plus wireof the main circuit through the contact plate 9 of the relay X to thewire 2, thence to the coil of the main switch t and back by way of thewire 20 and the trigger contact P to the minus wire of the main circuit.The closing of the main switch t starts the kick off-- motor by means ofthe automatic controller.

As soon as the kick off motor starts, the line shaft driven therebytransmits a synchronous movement through chains or gears to the kick offlimit switch Y. The first movement of this switch connects the ring 1'through the segment at, and button "on the contact finger (all of therings or segments turning relatively to the contact finger Y), so as toform a connection from the plus wire to the wire 2 wlnchcontinues duringnearly the entire rotation of the switch. The same movement connects theminus ring 2; by means of the segment w (and contact finger Y) which isconnected with the wire 20 so that this connection also is maintainedthroughout practically an entire revolution of the switch. Immediatelythereafter the connection to the seg:

ment 8 and wire 1 is broken, which releases the relay X and allows itscontact plates p and g to drop, breaking the contacts at these pointsand leaving the relay in conditionfor a repetition of the previousoperation when the next bar comes along from the mill. The closing ofthe circuit plus to 2 and the circuit minus to 20 by the limit switch Yholds the main switch t closed even though the former circuits throughits coil be broken by the dropping of the plate 9 of the. relay and thesecond advancement of the trigger Fby the next bar (this secondadvancement breaking the circuit which was formerly maintained fromminus to 20 through N). The main switch t of the kick off motor isthereafter held closed until the corresponding-limit switch Y hascompleted a revolution; and similarly the kick oii motor is continued inoperation until it has completed its cycle independently of the positionof the relay X and trigger F.

At the end of a revolution of the limit switch Y both sides of thecircuit which operates the main switch 2- are broken; that is the plusring 7 is disconnected from the segment a of the wire 2, and the minusring -v is disconnected from the segment 10 of the wire 20. The openingof the main switch 1 applies the switch (Z of the dynamic braking coil 0to stop the motor, the braking switch a? being closed when the mainswitch I- is open by the usual mechanism, one arrangement of which isshown diagrammatically in Fig. 8. The kick 05 motor is thus stoppedautomatically at the initial point of its cycle and the kick off limitswitch Y stops likewise.

The hot bed motor is started from the kick off limit switch Y at adetermined point in the cycle of the kick of? motor and its limit switchY. For this purpose the switch Y has a segment .11 connected to a wire 3which in turn is connected to a short segment y of the hot bed limitswitch Z: the segment 3/ being connected by the usual contact finger (inthe initial position of the hot bed switch) to a contact ring .2 whichis As soon vance endof the segment m to the uppermost point so as tomake a connection from plus to 3 and .thus to close the circuit throughthe coil of the main switch 50 of -'the hotbed motor, and-this startsthe latter through its automatic controlling circuits la, 2' and m. Thehot bed limit switch Z has which a segment 51 constituting nearly acomplete starts and just before the entire connection through the kickoff limit switch Y and the wire 3 is broken by the passing of thesegment y out of contact with the finger of the switch Z. The directconnection plus to t through the hot bed limit switch Z is maintainedfor nearly a complete revolution; that is, practically to'the end of thecycle of operations of the hot bed motor.

The segment at of the limit switch Y passes under the finger of theswitch and maintains the circuit through 3 until the limit switch Z hasadvanced sufficiently to make the direct contact plus to t throu h thesegments 2 and 51; the segment w of t e switch Y passing out of contactshortly after the direct connection is made through the switch Z.Therefore, when the switch Z has made practically a complete revolutionand the segment 51 has passed out from under the contact finger of theswitch, breaking the direct contact plus to 4, the circuit through thewire 3 is also open; therefore, the circuit through the coil of the mainswitch 50 of the hot bed motor will bebroken and thisswitch will open,cutting oli' current from the motor. At the same time the dynamic brakeswitch k will close (by means of the usual mechanism), such as thatshown diagrammatically in Fig. 8, and the dynamic braking resistance jwill be brought into the circuit and the motor will be stopped at theinitial point of its cycle-0f operations.

When it is desired to operate without the automatic switches which stopthe motors at the end of each separate revolution, in order to collectseveral bars on the cold run out at one time for example, this may be.

done by means of a bed-clearing switch 0 which makes a direct connectionfrom the plus wire of the main circuit to the wire 4:

' off will not operate and the bar will continue on the hot run outuntil it strikes the safety trigger M at the end of the hot run outfarthest fromthe mill. This will establish a connection from the plusmain to the wire 2 through the contact plate 52, and

i a from the minus main to the w1re 20 through the contact plate 53.These contacts will thus close the circuit through the coil of the mainswitch t and'will start the motors and limit switches as before. I

In either case the controlllng apparatus will not start its cycle ofoperations until the end of the bar has passed the main trigger and theproper sequence of operations will follow, the hot bed rack bging set inposition after the bar has been 'kicked ofl' from the hot run off ontothe bed. The positively driven limit switches and the dynamic brakingcircuits control the series of operations accurately and safely. Thispermits of the safehandling of bars following each other very closely;the contacts of the limit switches closing circuits which parallel thetrigger-controlled circuits immediately after the operation of the kickofi' motor commences. The cycle of the controlling mechanism inay 'bedividedinto iive successive stages as follows.

(1) During the passage of a bar past the trigger F the relay X remainsclosed and holds the contact plus to 2 closed, but the contact from themain switch t and the line 20 is broken at the trigger so that there isno operation of the motors.

(2) As soon as the first bar passes the trigger and the latter returnsto its initial position the circuit of the main switch 6 is closed sothat the kick ofi' starts.

(3) The kick oii switch continues its own motor in operationindependently of the trigger and positively stops it at the end of acycle of its operations.

t) During the operation of the kick 0d motor, as soon as the kick ofi'has transferred the bar from the hot run out to the hot bed andreturning below the level of the next bar on the run out, the hot bedmotor is started by means of the kick ofl" limit switch. The starting ofthe hotbed motor causes its limit switch to close the circuitcontrolling the starting switch ofthe hot bed motor. The hot bed motoris then maintained in operation until it completes its'cycle,independently of the operation of the kick ed,

and is stopped in its initial position.

(5) 'The arrival of the kick ofl? limit switch at the end of arevolution restores the circuits controlling the kick 011 motor to theiroriginal position, so that this motor can be started again only after asecond bar passes the trigger. And the arrival of the hot bed limitswitch attheend of a revolution opens the circuit controlling the hotbed motor so that thelatter can be started again only through thekickoff limit switch.

Though We have described with great particularity of detail-a particularapparatus embodying our invention, yet it is not to be understoodtherefrom that the invention is restrict'edto the particular embodimentdescribed. Various modifications thereof in detail and in thearrangement of the parts may be made by those skilled in the art withoutdeparting from the invention and the mechanism maybe applied to thecontrolling of other types of hot bed and run out e ther in the formshown or with suitable modifications to adaptit to the requirements'ofthe ty e of hot bedand run out in question.

IVhat- We claim ist 1. In a hot bed and run out table mechanism, incombination, a kick 01$ for shifting a bar transversely from the hot runout on to the hot bed, a motor for operatlng sa d kick off, automaticmeans -for starting said motor and means for causing said motor tooperate said kick oif through a complete; cycle of operations thereofindependently of pendently of the position of said automatic means attersaid motor is started.

3. In an apparatus of the class described, in combinationg'a kick offmotor, automatic means for starting said motor and means for causingsaid motor to make a complete cycle" of operations independently of thepos1t1on= of said automatic means after said motor is started, a1 hotbed motor, automatic means for starting said hot bed motor when saidkick off motor has advanced to a determined point and means for causingsaid hot bed motor to make a complete cycle of operations independentlyof the position of its automatic starting means after said hot bed motoris started.

4. I van apparatus of the class described, in com ination, a kick 03motor, "automatic means for starting said motor and means for causingsaid motor to make a complete cycle of operations and to stop at the endof such cycle independently of the position of said automatic meansafter said motor is started, a hot bed motor, automatic means for starting said hot bed motor when said kick off motor has advanced to adetermined point and means for causing said hot bed motor to make acomplete cycle of operations and to stop at the end of such cycleindependently of the position of its automatic starting means after saidhot bed motor is started. '1 5. Ina hot bed'and run out table mechanism,in combination, a hot run out adapted to convey a hot bar lengthwise, atrlgger adapted to be operated by such a bar. and to be released whenthe bar passes, mechanism for moving such bar laterally, and a motor foroperatm said mechanism and having controllingcircuits which are renderedop- 'erative only by an operation and a subsequent release of saidtrigger.

.6. In an apparatus of the class described,

Q in combination, a trigger adapted to be operated by a bar and to bereleased when the .bar passes, and a motor having controlling circuitswhich are rendered operative only by an operation and a subsequentrelease of said trigger, and a safety trigger adapted to be operated bya bar after the latter has passed the first trigger, said controllingcircuits adaptedto be rendered operative also upon such operation of thesafety trigger.

7. In a hot bed and run out table mecha-' nism, in combination, a kick0d for shifting ing said hot bed, automatic means for clos-- ing-acontrolling circuit of said motor and a hot bed switch operated fromsaid motor and closing a circuit. controlling said motor parallel withthe circuit closed by said automatic means. 7

9. In an apparatus of the class described, in combination, a kick ofimotor, automatic means for closing a controlling circuit of said motorand a kick ofi' switch operated from said motor'and closing a circuitcontrolling said motor parallel with the circuit closed by saidautomatic means, a hot bed motor having a controlling circuit which isclosed by sald kick off switch at a determined point in the advance ofthe kick off motor and a hotbed switch operated from the hot bed motorand closing a circuit controlling said hot bedmotor parallel with thecircuit closed by said kick off switch.

10. In an apparatus of the class described, in combination, a kick of?motor, automaticmeans for closing a controlling circuit of said motor, akick off limit switch operated from said motor and closing a'circuitcontrolling said motor parallel with the circuit closed by saidautomatic means and causing said motor to make a complete cycle of oerations and to stop at the end of such cyc e, a hot bed motor having acontrolling circuit which is closed by said kick off limit switch at adetermined point in the advance of the kick off motor and a hot bedlimit switch operated from said hot bed motor .and closing a circuitcontrolling said hot operations and to stop at the end of such cycle.

11. In an apparatus of the classdescribed, in combination, a motor, anelectrically controlled main switch for sald motor, a set-up relay forclosing a break in the circuit ofsaid switch, and a trigger which in itsnormal position closes another break 1n sa1d circuit and which 1n itsdeflected position closes a break in the circuit through said saidswitch, and a trigger which in its normal. position closes another breakin said circuit and which 1n its deflected position closes a break inthe circuit through said relay, whereby an operation of the triggerfirst operates said relay to close one break in the circuit of theswitch and then closes a second break in the same circuit and causes theclosing of the switch and a safety trigger in line with the firsttrigger and adapted when deflected from its normal position tocompletely close a circuit through said switch.

. 13. In an apparatus of the classdescribed, in combination, a motor, anelectrlcally controlled main switch for said motor, a set-up relay forclosing a break in the circuit of. said switch, and a trigger whichinits nor-.

thereof, said limit switch being driven from said motor to make acomplete operation for each operating cycle of the motor, said limitswltch in its normal position closing a second break in the circuit ofsaid relay andopening a shunt around the circuit through the trigger inits normal position, said-limit switch when operated closing a directcircuit of the main switch and then breaking the circuit of the relay toprevent operation thereof by the trigger and also closing said shuntaround the trigger to. cause the holding of the main switch closed untilthe limit switch makes a complete revolution.

In witness whereof we have hereunto signed our names.

'iVlLLlAll/l AHLEN.

KARL H. CEDERL *ND.

